-
Identification and Control Methods for the Tea Bug and the Yellow-Spotted Bug
Distribution area: Morphological characteristics: The adult tea bug (Halys dentata) is about 15 mm long and 8-9 mm wide. The body is flattened and oval. Grayish-brown, with a slight purplish-red tinge. The antennae have 5 segments; segment 2 is longer than segment 3; both ends of segment 4 and the base of segment 5 are yellow. The thorax dorsum and forewings are densely covered with dark brown punctures. The eggs are cup-shaped and grayish-white. 20-30 eggs are arranged into an egg mass. The nymph is slightly flattened and round, dark brown, with dark spots on its back. The adult yellow-spotted bug (Erthesina fullo) is 20-30 mm long and 8-11 mm wide. Grayish-brown, with the body dorsum and forewings densely
-
Identification and Control Methods of Paecilomyces lucidus Disease
Paecilomyces belongs to the subphylum Deuteromycotina, class Hyphomycetes, order Hyphomycetales, family Hyphomycetaceae, genus Paecilomyces. The species commonly found in production is Paecilomyces variotii (p.varictBainier). 1. Morphological characteristics: The hyphae are white, transparent, and septate. The colony is earthy yellow and is often mistaken for Aspergillus flavus, commonly called yellow mold by mushroom growers. Conidiophores arise from aerial hyphae or cord-like hyphae; the phialides are slender and elongated, swollen at the base, tapering to a pointed tip, often curved, single to broom-like branched. Conidia are short cylindrical to long elliptical, smooth
-
Identification and Control Methods for Dactylium cobweb disease in lingzhi (Ganoderma)
DactyliumdendroidesFries belongs to the subdivision Deuteromycotina, class Hyphomycetes, order Moniliales, family Moniliaceae, genus Dactylium. 1. Morphological characteristics: The hyphae are pure white and cottony. The conidiophores are slender and sparse, with whorled branches arranged in a radiating pattern. The conidia are oblong, colorless, borne at the tips of sterigmata, solitary or in small clusters, mostly with 4 cells. 2. Disease development pattern (1) Transmission route: Dactylium lives in soil and is widely distributed in soils rich in organic matter.
-
Identification and Control Methods for Common Diseases of Edible Fungi
Brown rot, also known as white rot, wet bubble disease, etc. When diseased mushrooms are infected at a young stage, they cannot further differentiate and develop, and later form deformed mushrooms, often with a layer of "white fuzz" growing on the surface, which is the mycelium of the pathogen. When the temperature is above 20°C, over 4 to 5 days, the diseased mushrooms darken in color, then rot, exuding a brown (soy-sauce-like) liquid and becoming decayed and foul-smelling; below 20°C, this process takes longer. When the fruiting body is infected at the mid stage, brown lesions appear on the cap, the stipe becomes swollen and thick, and then the mushroom body softens. Cutting open the diseased mushroom reveals that its interior changes from white to grayish-white
-
Identification and control methods for several common diseases of edible fungi
I. Causes of deformed mushrooms and measures to avoid them. Deformed mushrooms lower product grade and may even lose their commercial value, affecting the economic benefits of cultivation; this problem is widespread. Common deformed mushrooms include: caps tightly clasped and not opening, appearing "fist-shaped"; stipes long, thick and fleshy with small caps, appearing "vase-shaped"; caps sunken with cracked, outward-curling edges, appearing "broken-bowl-shaped"; caps narrow and long, appearing "ox-tongue-shaped"; caps with spots on the surface, appearing "pockmarked"; caps with swollen tumor-like protrusions in the center, appearing "belly-swollen"; two caps spreading side by side with stipes tightly joined, appearing "butterfly-shaped"; caps curved and uneven, appearing "wavy-edged"
-
Identification and Control Methods of Common Fungal Diseases of Azaleas
Among the common azalea diseases, the main fungal diseases include azalea powdery mildew, rust, gray leaf spot, blight, and leaf gall, among others. These diseases mainly affect the leaves, young branches, buds and floral organs of azaleas, and when not controlled in time they often cause great losses. (1) The main differences among the following diseases are: 1. Azalea powdery mildew: generally occurs in the middle and late stages of growth, initially appearing as chlorotic spots, then growing a white mycelial layer and producing large amounts of powdery conidial layers, turning grayish brown in the later stage 2. Azalea rust: in the early stage, transparent golden or
-
Identification and Control Methods for the Azalea Lace Bug
The azalea lace bug, also called the azalea lace bug (Stephanitis pyrioides), and "little stink bug." Adults are about 3.5 mm long, dark brown, with wings covered in a network of veins; the forewings are slightly rectangular, and at rest the dark brown markings on the wings form an "X" shape. Nymphs resemble the adults but are tender and small, wingless, and about 2 mm long. Eggs are 0.6 mm long, oval, milky white, laid along the midrib and larger leaf veins, pale green when first laid and later turning pale yellow. There are 3 to 4 generations per year. Adults overwinter from mid to late October in bark and soil crevices and other such places, and the following year
-
Symptom Identification and Control Methods for Azalea Leaf Gall
Symptoms: Azalea leaf gall, also known as cookie disease. The young tissues of azaleas can all be affected, mainly damaging flower buds, young leaves and new shoots. On the upper surface of the leaves, initially pale yellow semi-transparent round spots appear, later turning yellow and sunken; the underside of the leaves is pale red, thickened and swollen, subsequently raised into galls, with a thick grayish-white powdery layer on the gall surface, like a cookie, and the leaves wither, yellow and fall early. In severe cases, the petiole lesions merge into patches, deformed and thickened. When young shoots are affected, fleshy lotus-like leaves or tumor-like leaves are produced at the tips, later shrinking into sac-like forms. After the petals are infected, they become abnormally thickened, forming irregular galls.
-
Identification and Control of the Lawn Pest: The Chinch Bug
The chinch bug belongs to the order Hemiptera, family Lygaeidae. In recent years, due to abnormal temperature changes, the damage caused by chinch bugs has become increasingly severe, especially to lawns of bluegrass and bentgrass. I. Ecological Habits and Characteristics: The nymph is small, with incompletely developed wings, unable to fly, but capable of long-distance jumping. Its body color ranges from slightly red to black, with a yellow-white stripe on its back. The adult is black, about 1 cm in body length, with folded white wings. When you pull apart dying lawn grass, you can see the pests scurrying in all directions. Chinch bugs prefer heat, and with rising
-
A detailed guide to the evaluation method for green maocha, mastering the key points of green tea quality identification
The evaluation of green maocha mainly refers to long-pan-fired green tea, baked green tea, and round-pan-fired green tea. It is divided into dry evaluation of appearance and wet evaluation of internal quality. Appearance evaluation grades the appearance based on factors such as tightness, tenderness, uniformity, and cleanliness of the maocha. Tightness refers to the degree of compactness of the maocha. Tenderness depends on the proportion of tender buds and pekoe. Uniformity is judged by tightly rolled strips or particles that are intact, with the upper, middle, and lower grades of tea well balanced. Cleanliness mainly evaluates the content of stems, coarse pieces, seeds, and other inclusions. Internal quality evaluation is divided into four items: liquor color, aroma, taste, and infused leaf. The evaluation for maocha purchasing mainly compares the tenderness and
条件筛选